Parkinson’s Disease with OFF Episodes

Code G20, Parkinson’s disease, has been expanded with the creation of five codes describing Parkinson’s disease with and without dyskinesia and fluctuations. Parkinson’s disease (PD) is a progressive neurodegenerative disease that presents with motor symptoms such as tremors of the hands, arms, legs, or head, as well as nonmotor symptoms such as depression, anxiety, and pain. Currently, there is no cure for PD, and treatment consists of the medication levodopa to relieve symptoms.Dyskinesia is the involuntary movement of the face, arms, legs, or trunk. PD fluctuations refer to periods of ON episodes where there...

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Note:  The following article synopsis was NOT provided by the AHA. It was created by Find-A-Code/innoviHealth.

Article Overview

This article covers an update to ICD-10-CM Parkinson’s disease coding, including newly created subcategories that distinguish Parkinson’s disease with and without dyskinesia and with and without fluctuations, along with an unspecified Parkinsonism category. It also discusses the clinical concepts behind these terms and presents a coding-oriented patient scenario for context. The article is relevant to coders, auditors, clinicians, and revenue cycle staff who work with neurology documentation and diagnosis coding.

Why This Topic Matters

Parkinson’s disease documentation can vary by symptom pattern and treatment-related fluctuation status, so this update affects diagnosis specificity and code selection in neurology-related claims and records.

What You Will Learn

  • How the ICD-10-CM Parkinson’s disease category was expanded
  • The general clinical meaning of dyskinesia and fluctuations in Parkinson’s disease
  • How Parkinsonism is distinguished at a high level from Parkinson’s disease in the update
  • How a coding vignette is used to illustrate the topic

Who Should Read This

  • Medical coders
  • Coding auditors
  • Clinical documentation specialists
  • Revenue cycle staff
  • Neurology practices

Codes Discussed

  • ICD-10-CM: G20
  • ICD-10-CM: G20.A1
  • ICD-10-CM: G20.A2
  • ICD-10-CM: G20.B1
  • ICD-10-CM: G20.B2
  • ICD-10-CM: G20.C

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